[ 24.937548] BUG: Bad rss-counter state mm:00000000dacbef94 type:MM_FILEPAGES val:33 [ 24.937579] BUG: Bad rss-counter state mm:00000000dacbef94 type:MM_ANONPAGES val:22 [ 25.362732] ================================================================== [ 25.363851] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.364977] Read of size 8 at addr ffff888019a67a50 by task sshd/219 [ 25.366061] [ 25.366323] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.367390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.368586] Call Trace: [ 25.368981] [ 25.369332] dump_stack_lvl+0x91/0xf0 [ 25.369923] print_report+0xcc/0x620 [ 25.370514] ? __virt_addr_valid+0x102/0x340 [ 25.371205] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.371840] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.372453] kasan_report+0xbe/0xf0 [ 25.372929] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.373558] vma_interval_tree_remove+0xc75/0xec0 [ 25.374158] vma_prepare+0xc54/0x11a0 [ 25.374648] __split_vma+0x5af/0x950 [ 25.375151] ? __pfx___split_vma+0x10/0x10 [ 25.375682] ? find_held_lock+0x2c/0x110 [ 25.376205] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.376779] ? lock_is_held_type+0x9f/0x120 [ 25.377318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.377925] ? mtree_range_walk+0x632/0x900 [ 25.378475] ? mas_walk+0x5c7/0x7c0 [ 25.378955] do_vmi_munmap+0x1f1/0x2b0 [ 25.379468] mmap_region+0x1f9/0x2660 [ 25.379949] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.380460] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.381170] ? __pfx_lock_acquire+0x10/0x10 [ 25.381704] ? __pfx_mmap_region+0x10/0x10 [ 25.382233] ? security_mmap_addr+0x7d/0xa0 [ 25.382763] ? get_unmapped_area+0x1f5/0x3f0 [ 25.383334] do_mmap+0x854/0xf00 [ 25.383773] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.384280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.384846] ksys_mmap_pgoff+0x3af/0x500 [ 25.385351] do_syscall_64+0x3f/0x90 [ 25.385828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.386483] RIP: 0033:0x7f17af640d82 [ 25.386946] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 25.389079] RSP: 002b:00007ffccf920ea8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.389978] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17af640d82 [ 25.390827] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17aea7a000 [ 25.391688] RBP: 00007f17aea7a000 R08: 0000000000000009 R09: 0000000000001000 [ 25.392533] R10: 0000000000000812 R11: 0000000000000206 R12: 000055683355eec0 [ 25.393378] R13: 00007ffccf920ec0 R14: 00007ffccf920ef0 R15: 00007ffccf921250 [ 25.394245] [ 25.394539] [ 25.394759] Allocated by task 205: [ 25.395201] kasan_save_stack+0x22/0x50 [ 25.395718] kasan_set_track+0x25/0x30 [ 25.396205] __kasan_slab_alloc+0x59/0x70 [ 25.396733] kmem_cache_alloc+0x16b/0x370 [ 25.397241] vm_area_dup+0x20/0x160 [ 25.397702] __split_vma+0x170/0x950 [ 25.398159] split_vma+0xc6/0x110 [ 25.398660] mprotect_fixup+0x8d2/0xb30 [ 25.399306] do_mprotect_pkey+0x87e/0xd40 [ 25.399820] __x64_sys_mprotect+0x78/0xc0 [ 25.400336] do_syscall_64+0x3f/0x90 [ 25.400799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.401436] [ 25.401652] Freed by task 205: [ 25.402036] kasan_save_stack+0x22/0x50 [ 25.402533] kasan_set_track+0x25/0x30 [ 25.403016] kasan_save_free_info+0x2b/0x50 [ 25.403561] __kasan_slab_free+0x10a/0x190 [ 25.404086] kmem_cache_free+0x10d/0x4d0 [ 25.404590] rcu_core+0x8c8/0x2860 [ 25.405028] __do_softirq+0x1b7/0x7d4 [ 25.405503] [ 25.405722] Last potentially related work creation: [ 25.406296] kasan_save_stack+0x22/0x50 [ 25.406853] __kasan_record_aux_stack+0x8e/0xa0 [ 25.407446] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.408087] remove_vma+0x139/0x170 [ 25.408541] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.409097] do_vmi_munmap+0x1f1/0x2b0 [ 25.409577] __vm_munmap+0x138/0x3a0 [ 25.410047] __x64_sys_munmap+0x59/0x80 [ 25.410543] do_syscall_64+0x3f/0x90 [ 25.411014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.411660] [ 25.411874] The buggy address belongs to the object at ffff888019a679f8 [ 25.411874] which belongs to the cache vm_area_struct of size 168 [ 25.413314] The buggy address is located 88 bytes inside of [ 25.413314] freed 168-byte region [ffff888019a679f8, ffff888019a67aa0) [ 25.414706] [ 25.414922] The buggy address belongs to the physical page: [ 25.415599] page:0000000021bd798e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a67 [ 25.416685] memcg:ffff8880199eac01 [ 25.417107] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.417741] page_type: 0xffffffff() [ 25.418184] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.419093] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880199eac01 [ 25.420010] page dumped because: kasan: bad access detected [ 25.420668] [ 25.420886] Memory state around the buggy address: [ 25.421473] ffff888019a67900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.422345] ffff888019a67980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 25.423346] >ffff888019a67a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.424539] ^ [ 25.425512] ffff888019a67a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 25.426702] ffff888019a67b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.427927] ================================================================== [ 25.429220] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.405999] BUG: Bad rss-counter state mm:00000000e0b81f49 type:MM_FILEPAGES val:33 [ 27.407400] BUG: Bad rss-counter state mm:00000000e0b81f49 type:MM_ANONPAGES val:22 [ 27.798817] BUG: Bad rss-counter state mm:00000000a3618e3d type:MM_FILEPAGES val:33 [ 27.799592] BUG: Bad rss-counter state mm:00000000a3618e3d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61187' (ECDSA) to the list of known hosts. 2023/06/19 11:15:16 fuzzer started 2023/06/19 11:15:16 dialing manager at localhost:44161 2023/06/19 11:15:16 checking machine... 2023/06/19 11:15:16 checking revisions... [ 28.413379] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:15:16 testing simple program... [ 28.449202] cgroup: Unknown subsys name 'net' [ 28.496079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:15:15 Registers: info registers vcpu 0 RAX=ffffffff863b6885 RBX=0000000000000001 RCX=ffffffff863b6880 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff863b6884 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b61a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88800febf9a0 R15=ffff88806ce09a98 RIP=ffffffff8113113c RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9a06e39900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffef06bb000 CR3=000000000d9aa000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ff0799931a0 CR3=000000000f2a4000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=8ec9ff48d3e22b9af5441327f7d3407f XMM02=ec2efd57dc4c00df000000000011d0f8 XMM03=92843e091b54eb15000000000011d1c8 XMM04=e985eacf9bd0278b00000000000ae988 XMM05=751b9502027dc0b900000000001334f0 XMM06=bdf2e299e47b49d50000000000133378 XMM07=e042d86d42eb936e0000000000122d50 XMM08=92843e091b54eb15000000000011d1c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000